ACQUISITIONS AND FDIC INDEMNIFICATION ASSET: (Details 1) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Beginning balance	$ 4,881	$ 5,602
Discount accretion	0	0
Disposals	(2,985)	(721)
Total Covered Assets	1,896	4,881
Commercial
Business Acquisition [Line Items]
Beginning balance	3,451	4,122
Discount accretion	0	0
Disposals	(1,555)	(671)
Total Covered Assets	1,896	3,451
Consumer
Business Acquisition [Line Items]
Beginning balance	1,430	1,480
Discount accretion	0	0
Disposals	(1,430)	(50)
Total Covered Assets	$ 0	$ 1,430